Pack for rolling sheet metal.



PATENTED 001-20, 1903.

A. PATERSON PACK FOR ROLLING SHEET METAL.

APPLICATION FILED APR.19, 1902.

NO MODEL.

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UNITED STATES iabented October 20, 1909 PATENT OFFICE.

PACK FOR ROLLING SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 741,708, dated October2 0, 1903. Application filed April 19, 1902. Serial No. 103,762- (Nomodel.)

' .To all whom it may concern..-

Be it known that I, ALEXANDER PATERSON, of Wilkinsburg, in the county ofAllegheny and State of Pennsylvania, have invented a certain new anduseful Pack for Rolling Sheet Metal, of which the following is afull,clear, and accurate description, reference being bad to the accompanyingdrawings, forming part of this specification, in which- Figure 1represents my improved sheet or strip slit preparatory to folding toform a pack in accordance with my invention. Fig. 2 is a perspectiveview showing the sheet or strip folded to form my improved pack. Fig. 3is a perspective view of the pack after being pressed preparatory tobeing further rolled. Fig. 4 is a perspective view of another way offorming the pack.

In the usual method of rolling thin sheet metal the slab or billet isrolled to a bar or strip which is cut into separate pieces of a lengthequal to the width of the sheet desired. These pieces are then heatedand rolled transversely, singly or in pairs, to the length and thicknessrequired, according-to the uses to which the metal is to be put, thusproducing the sheet metal of commerce of blanks of single pieces orsheets.

any desired gage. In no case have I known of more than two sheets beingrolled together at this stage. The metal is heated five times betweenthe billet and the finished sheet, the first heating being the heatingof the billet before it is rolled into a bar,which is then cut intopieces the width of the sheet, as already described. The second heatingis the heating of these pieces, which are then rolled into The thirdheating is the heating of these singles, which after they are heated arerolled out two at a time and doubled lengthwise, forming packs of fourlayers. These packs of four layers are then heated, which makes thefourth heating. 'They are rolled out and doubled again, forming packs ofeight layers, which are again heated, constituting the fifth heating,and they are finally rolled out into finished black plate. All of thesedifferent heatings and rollings require speedy manipulation by skilledworkmen to prepare the material for each succeeding step in the process,thus nocessitating the expenditure of a large amount of labor and time.

I will now describe my invention, so that others skilled in the art maymanufacture and use the same.

Instead of cutting the sheet or strip 2 into separate pieces,as has beendone inthe method heretofore generally employed, I cut it into lengthscorresponding to several multiples of the width of the sheet desired andthen out these lengths transversely by slits extending partially across,leaving a connecting-web of metal along one edge of the strip. The stripso cut is then folded on the lines of the cuts the shape shown in Fig.3, forming a piece suitable for handling in piles with a number of othersimilar packs, which enables them to be manipulated in theheating-furnace for further rolling with the same facility as if theywere simple bars or billets. This obvi ates the difficulty which hasattended the handlin g and adjusting of single sheets and packs composedof single sheets as in the method now generally employed.

In forming my improved pack only two beatings between the billet and thefinished sheet of black plate are required instead of the five heatingsrequired in the old form of pack. The first is the heating of the billetbefore it is rolled into the strip or sheet, and after this strip hasbeen folded into the pack in the manner described and has beensubjected, preferably, to a cold forming treatment in rolls, presses, orother suitable apparatus the pack so formed is heated for the secondtime, after which it may be rolled into finished black plate withoutneed of any further heating.

Although, as hereinafter stated, I do not desire to limit myself to theparticular operation above described, yet, owing to the peculiarformation of the pack, it is capable of being formed inthis economicaland rapid manner. This not only enables the rolling of the sheet metalto be accomplished in a much less time than has heretofore beenpossible, but it results in a very considerable saving in labor. It alsoenables the packs to be heated more u niformly and economically thanheretofore, as will be apparent to those skilled in the art. The pack isa unit instead of being composed of separate sheets and may be formed ofmany sections folded one on the other and still comprising a unit.

Although I have described one method of forming my improved pack, I donot desire to limit myself to the same, as other methods ormodifications may be employed. One such modification is shown in Fig. 4of the drawings, in which the metal is folded in a zigzag direction intoseveral sections or leaves, and after it is so folded the doubled edges,excepting the connecting-web at one edge, are sheared off along thelines 3,1eaving the pack in almost precisely the same form as thatproduced by the method hereinbefore described. Nor do I desire to limitmyself to the zigzag folded pack, though important results are securedby such folding, and I intend to claim it specifically.

My packs may be reheated in any suitable furnace and rolled through anysuitable rolls until sheet metal of the desired gage is pro duced.

Having thus described my invention,what I claim, and desire to secure byLetters Patcut, is

1. A sheet-metal pack, comprising a sheet folded into layersdisconnected along the sides and connected at the forward corner orcorners only by portions forming integral parts of the original sheet.

2. A sheet-metal pack, comprising a sheet folded in a zigzag directioninto three or more layers connected together alternately at theirforward corners only.

3. Asheet-metal pack formedofastriphaving a transverse cut or cutsextending from one side almost to the other side of the strip, the stripbeing folded along the lines of said out or cuts.

In testimony whereof I have hereunto set my hand.

ALEXANDER PATIJRSON.

\Vitnesses:

JAMES K. BAKEWELL, A. M. STEEN.

